OpenXML Filter: reorder PowerPoint notes and comments

[Denis Konovalyenko]

PowerPoint note and comment document parts are extracted in the order they appear in the document. It would be nice to have them right after the slide they are related to (under a filter config option of course).

For more details please consider the document slides below:

And the order of extracted segments:

            "Slide 1. Title 1.",
            "Slide 1. Subtitle 1.",
            "Slide 2.",
            "Slide 2. Text.",
            "Box message 1.",
            "Box message 2.",
            "Slide 2. Note 1.",
            "Slide 2. Note 2.",
            "Slide 1. Note 1.",
            "Slide 1. Note 2.",
            "Slide 2. Comment 1.",
            "Slide 2. Comment 2.",
            "Slide 2. Comment 3.",
            "Slide 2. Comment 4.",
            "Slide 1. Subtitle1. Comment 1.",
            "Slide 1. Title 1. Comment 2.",
            "Slide 1. Subtitle 1. Comment 3.",
            "Slide 1. Title 1.",
            "User"

[Denis Konovalyenko]

A pull request #326 has been opened.